A guide wire which includes: (a) a core wire formed with a mounting portion at the distal end portion; and (b) a plurality of coil wires being fitted onto the mounting portion substantially in tandem, and having different mechanical properties, the adjacent coil wires being connected with each other...http://www.google.es/patents/US7322944?utm_source=gb-gplus-sharePatente US7322944 - Guide wire
